Wittman Buttercup, on wheel skis. The owner uses it to fly north and go ice fishing. Our resident aerodynamicist was intrigued by its unusual wingtips.
In Case You Missed it
Effect of Propeller RPM on Speed, Efficiency, Noise, and Vibration
Getting better performance from a constant-speed prop.
Understanding Experimental Light Sport Aircraft
Dave Martin explains the different designations of factory-built and Experimental Light Sport Aircraft and how they continue to evolve.